Polystream
多氯苯
🗣️ 情景例句
Be prepared to discuss details and be ready to answer questions.
应随时准备好讨论细节和回答对方的疑问。
I think we can draw up a tentative plan now.
我认为现在可以先草拟一具临时方案。
A few days later, she sent a boy to the workman to ask him if his name was Hans Bussman.
几天后，她派了一个男孩去问那人是否叫汉斯。巴斯曼。